orbitsThis Project is developing regionally enhanced satellite orbit and clock models to support real-time, centimetre-level positioning services regardless of location.

There are two work packages: one on the regional GPS/GLONASS orbit and clock enhancement system; and one on the regional QZSS/COMPASS orbit analysis platform.

The outcomes will facilitate a wider adoption of nationwide centimetre positioning in agriculture, mining and utilities, construction, maritime, defence and environmental protection applications.

In the sectors of agriculture, mining and construction alone, the benefits can reach the order of several billion dollars per annum due to increased productivity (Allen Consulting, 2008).

A large user group will be the intelligent transportation systems (ITS) sector where precise GNSS and wireless communication techniques are integrated to support vehicle safety systems. Applications of multi-GNSS based precise positioning for nationwide road safety alone can lead to significant social and economic benefits through lives saved and a reduction in losses due to road accidents.


In the last quarter work continued on the Uncalibrated Phase Delay (UPD) solution for evaluation with PPP-RTK algorithm. An updated solution was provided to Curtin for further testing.

Modified GAMIT software modules (ARC and ORBITS) for BEIDOU Satellite system (BDS) have demonstrated to perform slightly worse than GPS (overall orbit fit of 2.2cm rms for 7 days of precise orbit input compared to 1.13cm). It was also demonstrated that the solar radiation pressure model developed by the University of Berne (BERNE) works reasonably well for BDS.

PhD student Yongchao Wang spent two weeks at Wuhan University gaining an in-depth understanding of BDS orbit estimation algorithms.

Project Participants

Research & Education   -   Queensland University of Technology   -   Wuhan University

43pl   -   AAM   -   Ergon Energy Ltd   -   Fugro Pty Ltd   -   Leica Geosystems   -   SKM

Government   -   DERM Qld   -   DSE Vic   -   Landgate, WA


peter teunissenProf Peter Teunissen
Science Director P1, Project Leader P1.01

Yanming FengProf Yanming Feng
Project Leader 1.03